diff --git a/README.md b/README.md
index 74327dd..51c8767 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,6 @@ await main
   - for..in
   - macro the rest of the `console` library
   - macro the `??` operator
-  - tab size option
   - emit comments
   - disallow:
     - call expressions on arrow functions directly
diff --git a/src/code-generator.ts b/src/code-generator.ts
index 8414429..3a1d92f 100644
--- a/src/code-generator.ts
+++ b/src/code-generator.ts
@@ -83,8 +83,9 @@ export default class CodeGenerator extends StringBuilder {
 
   public constructor(
     private readonly sourceNode: SourceFile,
-    private readonly testing = false
-  ) { super(); }
+    private readonly testing = false,
+    tabSize = 2
+  ) { super(tabSize); }
 
   public generate(): string {
     if (!this.testing) {
diff --git a/src/string-builder.ts b/src/string-builder.ts
index 22c4018..e478091 100644
--- a/src/string-builder.ts
+++ b/src/string-builder.ts
@@ -2,6 +2,10 @@ export default class StringBuilder {
   protected indentation = 0;
   private readonly parts: string[] = [];
 
+  public constructor(
+    private readonly tabSize: number
+  ) {}
+
   protected get generated(): string {
     return this.parts.join("");
   }
@@ -27,6 +31,6 @@ export default class StringBuilder {
   }
 
   protected newLine(amount = 1): void {
-    this.append(("\n" + "    ".repeat(this.indentation)).repeat(amount));
+    this.append(("\n" + " ".repeat(this.tabSize).repeat(this.indentation)).repeat(amount));
   }
 }
\ No newline at end of file